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cc65/libsrc/tgi/tgi_geterror.s
cuz 5fec8ac5c3 Don't call the driver if we don't have one loaded
git-svn-id: svn://svn.cc65.org/cc65/trunk@1431 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-10-03 13:54:42 +00:00

25 lines
820 B
ArmAsm

;
; Ullrich von Bassewitz, 21.06.2002
;
; unsigned char __fastcall__ tgi_geterror (void);
; /* Return the error code for the last operation. This will also clear the
; * error.
; */
.include "tgi-kernel.inc"
.export _tgi_geterror
_tgi_geterror:
lda _tgi_drv ; Check if we have a driver
ora _tgi_drv+1
beq @L1
jsr tgi_geterror ; First call driver
@L1: ldx #$00 ; Clear high byte
ldy _tgi_error ; Test high level error code
beq @L2 ; Branch if no high level error code
tya ; Use high level code if we have one
stx _tgi_error ; Clear high level error code
@L2: rts